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fomenos
3 years ago
13

Which of the following statements best explains how elements can be distinguished from molecules and compounds?

Biology
1 answer:
Aleks [24]3 years ago
3 0

Answer: Option (b) is the correct answer.

Explanation:

A compound is defined as the substance in which different elements are chemically combined together in a fixed ratio by mass.

For example, MgSO_{4} is a compound and elements are present in 1:4 ratio.

A compound can be divided into its constituent or simpler substances.

On the other hand, a molecule is defined as a specie that contains same type of elements.

For example, O_{2} is an oxygen molecule.

And, an element is defined as a substance which is made up of only one type of atoms. An element can never be broken down into its constituent particles.

For example, a piece of lithium metal will contain atoms of lithium only.

Thus, we can conclude that the statement elements are made up of one kind of atom best explains how elements can be distinguished from molecules and compounds.

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Where do mature eggs go first after leaving the fallopian tube?
maxonik [38]

Answer:

D. is de answer

3 0
3 years ago
How many seeds develop from each ovule?<br> a) One.<br> b) Two<br> c) Three. <br> d) Four.
Readme [11.4K]

Answer: option "A" One seed develops from each ovule.

Explanation:

Ovules are the female reproductive part of the plant which is internally covered by the nucellus and integuments further helped in fertilization and development of seed.

After fertilization, ovule is the part of the plant develops into seed, after a period of time food tissue is developed inside it consisting the seed coats called integuments.

pollen grains or sperms are being transferred through the pollen tube to the embryo sacs from integuments only, which results into the fertilization and development of seed.

4 0
2 years ago
A student placed a disk of filter paper in each of the following solutions: disinfectant 1, disinfectant 2, disinfectant 3, and
beks73 [17]
<span>d. Disk soaked in distilled water

Experimentation is a scientific process wherein you test and verify a hypothesis based on its assumption is going to be supported or negated (null hypothesis). Hence experimentation involves the independent and dependent variable, also control variable as a level in the IV. </span>
8 0
3 years ago
The sickle-cell allele produces a serious blood disease in homozygous recessive individuals. why doesn't natural selection elimi
icang [17]

No, the sickle-cell anemia allele won't be eliminated by natural selection.

Sickle-cell anemia trait is controlled by a single gene and the allele (S) for sickle-cell anemia is a harmful autosomal recessive.

It is caused by a mutation in the normal allele (A) for hemoglobin (a protein on red blood cells).

Heterozygotes (AS) with the sickle-cell allele are resistant to malaria, a deadly tropical disease. It is common in many African populations.

In these areas, (S) carriers have been naturally selected, because their red blood cells, containing some abnormal hemoglobin, tend to be in sickle shape when they are infected by the malarial parasite.

Therefore, they are more likely to survive and reproduce. This keeps the S allele in the gene pool.

Learn more about Sickle-cell anemia on

brainly.com/question/14505007

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3 0
1 year ago
The muscular system helps with ____ and the skeletal system helps with ____. Question 1 options: movement; oxygen exchange movem
Anna007 [38]

Answer:

The correct answer is movement; structure.

The muscular system helps with <u>movement</u> and the skeletal system helps with <u>structure</u>.

Explanation:

The human muscular system constitutes 40% of the total weight of our body and is made up of three types of muscles, which, together with different tendons and thanks to their contraction capacities, allow us to move. The muscular system and the function of the muscles allow the movement of our body and it is the one that works in tune with other systems of our body to guarantee normal general functioning..The skeletal system is the set of organs that support, shape, structure and protect the body. The skeleton is a dynamic structure, specifically the axial skeleton, it is to serve as a support or as a scaffold that supports the organs and structures of the body. This is how bones together with muscles work as a team to allow the mobility of the human body.

5 0
2 years ago
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